Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB8978-1999
Contactor relay
Contactor relay
1999-08-06 Issue
Program name Program address
F: Lexel General grip
2000-01-01 Implementation
761929
Operation. Already. Status
Start at the beginning of each day and at the end of each day
JB8978-1999
This standard complies with the requirements of GB14048.5-1993 "Low-voltage switchgear and controlgear control circuit electrical appliances and switch elements, Part 1 electromechanical control circuit electrical appliances", and refers to the relevant provisions of GB14048.4-1993 "Low-voltage switchgear and controlgear low-voltage electromechanical contactors and motor starters". This standard is issued for the first time.
This standard is proposed and managed by the National Technical Committee for Low Voltage Electrical Appliances Standardization: This standard is drafted by Shanghai Electric Science Research Institute. Participating drafting units of this standard: Shanghai Shanzhong Electronic Appliance Factory, Changzhou Low Voltage Electrical Appliance Factory No. 2 Main drafters of this standard: Zhang Xinmiao, Xi Hong. This standard is entrusted to Shanghai Electric Science Research Institute for interpretation. 1 Scope
Machinery Industry Standard of the People's Republic of China
Contactor relay
Contactor relay
JB8978-1999
This standard specifies the general basic rules and requirements for JZ20 series contactor relays (hereinafter referred to as relays), including terminology, characteristics, normal working and installation conditions, structure and performance requirements, verification of characteristics and performance, etc. This standard applies to JZ20 series contactor relays: used in circuits with AC 50Hz (60Hz), rated working voltage 660V and below, and DC rated working voltage 220V and below, as remote control and automatic control elements in control circuits: can be used as contactors in main circuits, and can be combined with appropriate thermal relays or electronic protection devices to form electromagnetic or mechatronic motor starters; among them, relays with low control power (0.5W) can be used as interface relays for computer (or PC) control: Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T2423.1-1989
GB/T 2423.4-1993
GB/T2828—1987
GB/T 2900.1—1992
GB/T2900.18—1992
GB/T4207—1984
GB/T 5169.4—1985
GB/T 14048.1-1993
GB14048.4—1993
GB14048.5—1993
JB6525—1992
JB 8591.1--1997
Basic environmental test procedures for electric and electronic productsTest A: Low temperature test method (eqvIEC60068-2-1:1974)
Basic environmental test procedures for electric and electronic productsTest Db: Cyclic damp heat test method (eqvIEC60068-2-30:1980)
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches)Basic terms of electrical terminology
Electrical terminology Low voltage electrical appliances (eqvIEC60050 (441)-1:1984)Determination of comparative tracking index and leakage tracking index of solid insulating materials under humid conditions (neqIEC60112:1979)
Fire hazard test for electric and electronic productsGlow-wire test method and guidanceeq vIEC60695-2-1:1980）
General rules for low-voltage switchgear and controlgear (eqvIEC60947-1:1988) Low-voltage switchgear and controlgear Low-voltage electromechanical contactors and motor starters (eqyIEC60947-4-1:1990)
Low-voltage switchgear and controlgear Control circuit appliances and switching elements Part 1 Electromechanical control circuit appliances (eqvIEC60947-5-1:.1990) Electrical installation rails (eqvIEC60715:1981) CJ20 series AC contactors
Approved by the State Machinery Industry Bureau on August 6, 1999 and implemented on January 1, 2000
3 Terms, symbols and codes
3.1 Terms
JB 8978-1999
This standard refers to the relevant terms and definitions of GB/T2900.1, GB/T2900.18, GB14048.5 and GB14048.4: 3.2 Symbols
The main symbols used in this standard are: U., U, U,, Uiss, U, U, L, I, I., Lu, SCPD, Db, Ca, CTI, AC, DC, t, To, To.9s, etc.
Their names and meanings are specified in 3.2 of GB14048.5-1993. 3.3 Codes
The codes for the categories of use appearing in this standard are shown in Table 1, Table! Use category code
Use category code
AC-—15
AC—3
AC—4
Product model, specification
Typical application
Control AC electromagnet load (greater than 72VA)Control DC electromagnet
Starting and disconnection of squirrel cage induction motor during operationStarting, reverse braking or reverse operation, inching of squirrel cage induction motorProduct model and its meaning
Full model of relay and its meaning such as F:
Coil voltage code (Table 2)
Example: fuse line diagram
Example: DC ether valve
Contact combination code (Figure 1, Figure 2)
Operation mode and structure code (Table 3)
Basic specification code (Table 4)
Design code
Contactor relay
Table 2 Coil voltage code
Basic parameters
Rated insulation voltage U:
JB8978—1999
Table 3 Operation mode and structure code
Operation mode and structure
AC structure and its operation
DC structure and its operation
DC structure and its operation
DC structure and its operation
AC reversible structure and its operation
DC reversible structure and its operation
Table 4 Basic specification code
Rated control power
Rated working electro-hydraulic
Rated working current
Maximum rated working voltage U
Rated heating current m
P,=1000 VA
Rated control capacity (rated working current) (see Table 5 and Table 6). Table 5 Rated control capacity (for maintenance appliance) Type
JZ20-1/00O0
JZ20—6/0000
JZ20--9/D000
4.2.5 Use category
Rated control capacity
For relay
For contactor
For contactor
Rated working current
Table 6 Rated control capacity (for contactor) Rated working current
Relay The usage categories are: AC-3, AC-4, AC-15, DC-13: 4.2.6 Rated working system
The relay is suitable for the following working systems:
4.2.6.1 Eight-hour working system
Predetermined control capacity
The eight-hour working system is the basic working system, which stipulates the agreed heating current of the relay: 4.2.6.2 Uninterrupted working system
The relay contacts remain closed and carry a stable current for more than 8 hours (or several weeks or months) without interruption. =220V
4.2.6.3 Intermittent cycle working system
JB 8978-1999
The relay works in this system. The power-on holding rate is 40%. The maximum number of operations that can be achieved is 1200/h, (1200 grade) 4.2.6.4 Short-time working system
The standard value of the working current of the short-time working system is divided into: contact power-on time 10.30, 6090min, the current value is negotiated by the user and the manufacturer:
4.2.7 Control circuit
The rated control power supply voltage U of the relay shall meet the requirements of Table 2. The correct operating conditions for the control power supply voltage are: when the control circuit is connected to the maximum current, the control power supply voltage value shall not be less than 85% U; nor greater than 110% U; when the control circuit is disconnected, the control power supply voltage value shall not exceed 120% U. 4.3 Auxiliary contact
The relay can be equipped with an auxiliary contact module with two pairs of contacts to expand the number of contact groups of the relay to meet the requirements of the control circuit. 4.3.1 The code and meaning of the auxiliary contact module The code and meaning of the auxiliary contact module are as follows: ZA20-OO
A fusion head combination code (Figure 3)
Design code
Auxiliary contact module
4.3.2 Basic parameters of the auxiliary contact module
a) Rated insulation resistance U
b) Rated working current U
c) Conventional heating current l
d) Rated control capacity P.
100VA(~380V, ~660V);30W(=220V):4.3.3 Rated working mode of auxiliary contact module4.2.6 Applicable:
4.3.4 Use category
The use category of auxiliary contact module is: AC-15, DC-13.4.4 Type and classification
4.4.1 Type
The relay is a direct-acting electromagnetically operated electromechanical relay with a modular building block structure. The auxiliary contact module can be attached to the relay body as needed.
The relay is suitable for both rail installation and screw clamping installation4.4.2 Classification
4.4.2.1 According to the purpose
a) General control relay:
b) Interface relay for computer or program input: c) Used as a contactor.
4.4.2.2 According to the combination mode:
a) with auxiliary contact module;
b) without auxiliary contact module.
4.4.2.3 According to the structure mode:
a) non-reversible structure;
b) reversible structure.
5 Marking
5.1 Nameplate
JB8978-1999
In the normal working position, there should be a clear and indelible nameplate at the effective position of the relay housing. The nameplate should at least include the following contents:
a) Product model;
b) Manufacturer's name or trademark;
c) Conformed standards:
d) Rated parameters (U,, U., It, P., I,); e) Year and month of manufacture or serial number:
5.2 Coil marking
The relay should have a clear and indelible marking at the marking position of the coil skeleton, indicating the coil's operating voltage, power supply frequency and coil parameters:
5.3 Terminal marking
The relay should have a clear and indelible terminal marking at the corresponding position on the front of the cover. 5.3.1 Coil terminal marking
The markings on both ends of the relay coil should be A1 and A2. 5.3.2 Terminal marking
See Figures 1, 2 and 3 for terminal markings.
13233343
NONONONO
14 24 34 44
JZ20—1*40*
13213343
NONCNONO
14 2234 44
JZ20—1*31*
13213143
NONCNCNO
14 223244
JZ20—1*22*
Figure 1 Contact combination terminal mark when used as relay 13213141
NONCNCNC
14223242
JZ20-1*[3*
LIL2L3NO
T1T2T3
JZ20—6*10*
JZ20-—9*10*
ZA20--20
Normal working conditions
6.1 Ambient air temperature
JB8978-1999
L1 L2L3NC
T1T2T3
JZ20--6*01*
JZ20-9*01*
LIL2L3NO
TIT2 T3
JZ20—6*[0*
JZ20—9*10*
Figure 2 Contact combination terminal mark when used as contactor 53 61
ZA20--11
Figure 3 Contact combination terminal marking of auxiliary contact module 13513
L1L2L3NO
T1T2T3
JZ20—6*10*
JZ20—9*10*
ZA20-02
6.1.1 The maximum value of the ambient air temperature shall not exceed +40℃, and the lower limit of the minimum temperature shall be -5℃ (or -10℃, -25℃, please specify when ordering).
6.1.2 The 24h average value of the ambient air temperature shall not exceed +35℃. 6.2 Altitude
The altitude of the relay installation site shall not exceed 2000m. 6.3 Atmospheric conditions
The relative humidity of the atmosphere at the installation site of the relay shall not exceed 50% when the maximum temperature is +40℃; higher humidity is allowed at lower temperatures. When the average monthly temperature of the wettest month is +25℃, the average maximum relative humidity of the month shall not exceed 90%. Condensation on the product surface due to temperature changes is allowed: 6.4 Pollution level
The pollution level of the relay is level 3.
6.5 Installation category (overvoltage category)
The installation category of the relay is III.
6.6 Installation conditions
The relay should be installed in accordance with the relevant conditions specified in the instructions provided by the manufacturer. The inclination of the installation surface and the vertical plane shall not exceed 5°. For underground or other special occasions, the inclination is allowed to be no more than 15°~30°. The relay is suitable for the standard 6
mounting rail TH35-7.5 specified in JB6525
7 Technical requirements
7.1 Structural requirements
7.1.1 Overview
JB8978-1999
The relay should be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. The materials selected should be suitable for the performance requirements and be able to pass the corresponding tests: such as mechanical strength test, elastic component aging resistance test, fire hazard test, damp heat test, etc. For the insulating material that constitutes the creepage distance, the comparative tracking index (CTI value) must be measured. The relay is specified to use insulating materials of material group IIIa, and its CTI value is: 400>CTI175. 7.1.2 Terminals
The terminal of the relay adopts threaded compression type. The structure of the terminal should ensure long-lasting and necessary contact pressure to compress the wire without damaging the wire: The terminal must have sufficient current-carrying capacity to ensure that the heat dissipated by the relay does not damage the insulation of the connecting wire. The structure of the terminal must ensure that the connecting wire does not produce displacement that is harmful to normal operation or reduces the insulation level of a given installation category:
This relay uses M3 combination screws. There are two types of connection wires: 1×0.75mm2 to 2×2.5mm for hard wires without copper joints; 2×10mm2 to 1×2.5mm for multi-strand wires with copper joints. 7.1.3 Electrical clearance and creepage distance
7.1.3.1 Electrical clearance
According to the insulation coordination of the low-voltage system, the instantaneous overvoltage is limited to the specified impulse withstand voltage priority number. According to the installation category and pollution level 3 of the relay specified in this standard, according to 7.1.3.1.3 of GB/T14048.1, the minimum electrical clearance of the relay in Table 7 should be: 8mm. The minimum value of the electrical gap does not apply to the contact opening distance and the part affected by the arc: 7.1.3.2 Creepage distance
The minimum creepage distance of low-voltage electrical appliances is related to the rated insulation voltage of the electrical appliances, the pollution level and the type of insulation material selected. According to the provisions of this standard and the provisions of 7.1.3.2 in GB/T14048.11993, the minimum value of the creepage distance of the relay is: 101nm: The minimum value of the creepage distance does not apply to the arc-affected part and the contact spacing with free gas. 7.2 Performance requirements
7.2.1 Temperature rise
7.2.1.1 Limit value of allowable temperature rise
According to the selected contact structure material and the insulation grade of the coil, this standard stipulates that the temperature rise of each part measured by the relay shall meet the requirements of Table 7.
The temperature rise test of the auxiliary contact can be carried out together with the relay body or separately: Table 7 Limit value of temperature rise
Material type and component description
(or brass》Forged tin
Terminal
Steel (or brass) Chain silver
Class B insulation
Allowable temperature rise
Measurement by thermoelectric material method
Electrical method measurement
7.2.1.2 Ambient air temperature
JB897 8--1999
The temperature rise value specified in Table 7 should be within the range of +10~+40%. For details, see GB/T [4048.1--199318.2.3.3.17.2.1.3 Contacts
When the relay contacts (including auxiliary contacts) are tested for temperature rise, the agreed heating current should be passed through them: 7.2.1.4 Coil temperature rise
When the contacts are closed and the circuit is energized, the coil of the relay is de-energized at the rated frequency and rated control power supply. , it must be assigned a continuous load and its stable temperature rise does not exceed the provisions of Table 7. When the contacts are not energized and the control power supply conditions are the same as above, the temperature rise of the coil of the relay shall comply with the provisions of Table 7 when the operating frequency specified in Table 8 is tested. Table 8 Operating frequency
Maximum number of operations per hour
7.2.2 Dielectric properties
Each closing and breaking operation cycle
The dielectric properties of the relay are tested with power frequency withstand voltage. Power-on time
According to the U660V of the relay, the power frequency withstand voltage value that the relay should withstand is 2500V, and the pressure application time is 1min: 7.2.3 Action performance
When the ambient air temperature of the relay meets the requirements of 6.1, its pull-in voltage range and the minimum release voltage shall meet the requirements of Table 9. The lower limit of the release voltage is measured when the contact has been damaged; Table 9 Operating voltage range
Pull-in voltage range
85% U~i10% U,
Maximum release voltage
Minimum release voltage
The above tests should be carried out when the rated control power supply voltage is applied to the coil and the temperature rise of the coil reaches a stable state: 7.2.4 Wet heat performance
The relay should be able to withstand the assessment of the alternating mixed heat test method Db: 7.2.4.1 Test conditions
In the effective space of the Db test box, the temperature should be able to cycle between +25±3℃ and +40±2℃ in accordance with the provisions of GB/T2423.4:
7. 2.4.2 Test severity
The test severity adopts a test cycle of 6 days and nights. 7.2.4.3 Test conditions
When the relay is tested, the measurement should be carried out during the conditional test, that is, the measurement should be carried out in the last 1~21 of the low temperature and high humidity stage. At this time, the humidity in the test box is controlled at 95%~98%, and condensation on the surface of the test product is avoided. The insulation resistance is measured first, and then the frequency withstand voltage test is carried out. The withstand voltage value should be 80% of the value specified in 7.2.2, lasting 1min, and the insulation resistance value is not less than 1.5MQ. 7.2.5 Making and breaking capacity
7.2.5.1 Making and breaking capacity of use category AC-15, DC-13 a) Making and breaking capacity under normal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 10: 8
Use category
DC-13
Predetermined control
1000VA
JB8978-1999
Table 10 Making and breaking capacity of AC-i5, DC-13 under normal conditions The tolerance of the test value of force connection is as follows: 8.2.2.2 of GB14048.5-1993. The first 50 operation cycles are carried out under the conditions of U/U,-1.1. 0.3. Operation conditions. Operation cycles. Number of times. 21. Operation times per minute. Relay. 6P is an empirical formula: It is obtained from the empirical relationship that the upper limit of most DC tunnel iron loads is P=50W, that is, 6P=300ms. For loads with power consumption greater than 50W, it can be assumed that it is composed of smaller loads in parallel. No matter how much the power consumption value is. 300ms can be used as the upper limit value
b) Making and breaking capacity under abnormal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 11 in the usage category specified in 3.3: Table 11 Making and breaking capacity of AC15 and DC-13 under abnormal conditions
Usage category
Predetermined control
1000 VA
Operating conditionsbZxz.net
Operating cycle
Operation times per minute
Relay
Relay
The making and breaking capacity test of the auxiliary contact shall be carried out on the relay, and it is allowed to be tested separately from the relay: 7.2.5.2
Making and breaking capacity of usage category AC4
a) The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 12:1 Making and breaking capacity of AC-15 and DC-13 in use category a) Making and breaking capacity under normal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 10: 8
Use category
DC-13
Predetermined control
1000VA
JB8978-1999
Table 10 Making and breaking capacity of AC-i5 and DC-13 under normal conditions
Test value Tolerance see: GB14048.5-1993 8.2.2.2 The first 50 operation cycles are carried out under U/U,-1.1 conditions 0.3
Operation conditions
Operation cycles
Number of times 21
Per minute
Operation times
Relay
6P is an empirical formula: It is obtained from the empirical relationship that the upper limit of most DC tunnel iron loads is P=50W, that is, 6P=300ms. For loads with power consumption greater than 50W, it can be assumed that it is composed of smaller loads in parallel. In this case, no matter how much the power consumption value is. 300ms can be used as the upper limit value
b) Making and breaking capacity under abnormal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 11 in the usage category specified in 3.3: Table 11 Making and breaking capacity of AC15 and DC-13 under abnormal conditions
Usage category
Predetermined control
1000 VA
Operating conditions
Operating cycle
Operation times per minute
Relay
Relay
The making and breaking capacity test of the auxiliary contact shall be carried out on the relay, and it is allowed to be tested separately from the relay: 7.2.5.2
Making and breaking capacity of usage category AC4
a) The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 12:1 Making and breaking capacity of AC-15 and DC-13 in use category a) Making and breaking capacity under normal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 10: 8
Use category
DC-13
Predetermined control
1000VA
JB8978-1999
Table 10 Making and breaking capacity of AC-i5 and DC-13 under normal conditions
Test value Tolerance see: GB14048.5-1993 8.2.2.2 The first 50 operation cycles are carried out under U/U,-1.1 conditions 0.3
Operation conditions
Operation cycles
Number of times 21
Per minute
Operation times
Relay
6P is an empirical formula: It is obtained from the empirical relationship that the upper limit of most DC tunnel iron loads is P=50W, that is, 6P=300ms. For loads with power consumption greater than 50W, it can be assumed that it is composed of smaller loads in parallel. In this case, no matter how much the power consumption value is. 300ms can be used as the upper limit value
b) Making and breaking capacity under abnormal conditions The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 11 in the usage category specified in 3.3: Table 11 Making and breaking capacity of AC15 and DC-13 under abnormal conditions
Usage category
Predetermined control
1000 VA
Operating conditions
Operating cycle
Operation times per minute
Relay
Relay
The making and breaking capacity test of the auxiliary contact shall be carried out on the relay, and it is allowed to be tested separately from the relay: 7.2.5.2
Making and breaking capacity of usage category AC4
a) The relay shall be tested for making and breaking circuits without failure under the test conditions specified in Table 12:
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